warning "missing argument"

[eluser]Unknown[/eluser]
hi,

i have a model with a function which has some arguments with default values like...

Code:

function doSomething($arg1, $arg2="foo") { ... }

calling that function from a controller like....

Code:

doSomething("stupid");

returns a warning message saying

Missing argument 2 for Foo_model::doSomething(), called in /path/to/file.php on line XX and defined

what i'm doing wrong?

thanks
martin